I'm excited about Neobook 5.6.2 and VBScript. Recursive functions/nested loops were in Neobook always slow and CPU-consuming. The best alternative in terms of speed was the LUA-plugin, that is however no longer maintained. With VBScript you can make very fast applications with efficient use of CPU-resources. For demonstration purposes I made an application with a very inefficient and -in a way- silly Factorial-task and with a Replace task with necessary arrays and nested loops. To experiment with this application, implement the following VBScriptfunctions, save the NeobookPUBcode to test.pub and run the program. Thanks Neobook, for the VBScript-implementation!